Prisma

GTS offers and sells available capacity via Prisma, the joint capacity booking platform of the major European transmissionsystem operators in accordance with the requirements of the European Network Code on Capacity Allocation Mechanisms (NC CAM).

The CAM NC prescribes five standard capacity products to be offered by the European TSO’s at the cross border interconnection points. These products are:

Yearly capacity (gas years)

Quarterly capacity

Monthly capacity

Daily Day Ahead (DA) capacity

Daily Within Day (WD) capacity

These capacity products are auctioned in accordance with a predefined auction calendar published by ENTSOG. Each auction is preceded by the publication of the capacities offered by the TSO’s. Both data for all of our auction products can be found on the website of PRISMA.

For each product type the PRISMA platform will on the basis of the amount of capacity offered by each TSO, determine how much capacity will be offered as bundled and/or unbundled capacity. Firm capacities on both sides of the border are bundled to a maximum level. Remaining capacity that can not be bundled is offered as unbundled capacity. Unbundled capacity is offered in a separate auction that runs in parallel with the auction for the bundled capacity.

Within-day capacity is offered every day (including weekends and business holidays) and consists of the remaining firm forward and firm backhaul capacity from the day-ahead auctions on the PRISMA platform.

The first within-day bidding round opens at 19.00h (LET). This bidding round is open for 7,5 hours until 2.30h (LET). The following bidding rounds open at the start of every hour and are open for 30 minutes. The capacity of a successful bid can be used 3,5 hours after closure of the bidding round.

The tariff for within-day capacity is based on the daily capacity tariff and a within-day factor. This factor is determined on the number of hours the capacity is made available for: within-day factor = number of hours/24.

Interruptible capacity, transfers of capacity and Surrender of Capacity (SoC) in combination with the within-day product is not supported.

An overview of all interconnection points where capacity is auctioned via PRISMA